Ferrule mounting



April 30, 1940. L. D. MILLER FERRULE MOUNTING Filed Nov. 30, 1938 Patented Apr. 30, 1940 l STATES? FERRULE MOUNTING Lavon D. Miller, Hicksville, Ohio Application November 30, 1938, Serial No. 243,079

1 Claim.

This invention relates to assembly of a sleeve on a woodlike handle.

This invention has utility more particularly when incorporated in tapered tubular ferrule into which may be inserted a wood handle which has been previously immersed in hot oil and the as- Fig. 4 is a view of the wood handle of Fig. 1

previously dried and thus immersed for a hot bath;

Fig. 5 is a view of the assembly between the ferrule of Fig. 3 and the wood handle after the bath of Fig. 4; v

Fig. 6 is a view of the press-formed or bend shaping of the combined ferrule and wood handle; and

Fig. '7 is a view, with parts broken away, of the formed or distorted combined ferrule and handie of Fig. 6 as adapted to carry a tool.

A cylindrical handle I, as of fibrous material such as wood, is shown with a slight shoulder 2 and low degree of a taper portion 3 to a more abrupt taper portion 4 toward a tool end terminal 5. A blank 6 is shown with slightly converging sides I to more abruptly converging sides 8 thence, to a short width portion 9. This blank (Fig. 2) is formed into a tubular ferrule III having a weld I I continuous along one side thereof through a major taper portion I2 to a small terminus I3. Remote from this terminus I3 is the less degree taper portion I4 in this completed tubular ferrule.

Burner I5 may be effective under a vessel I6 containing a liquid I'I, thereby to provide a bath in which the reduced portions of the handle I may be immersed from the small end 5 to or slightly above the shoulder 2. This immersion is at a temperature for effective penetration of the heat thinned liquid, whether such be paraflin wax of 146 melting point, crude paraflin,

petrolatum, linseed oil, or straw oil. The pur-,

pose is that the enveloping of the heated wood in the liquid has a tendency against open pore re side.

the air, it is found there is retained the life values forflexing, bending, and against fracture comparable to, if not exceeding, that of approximately green wood fiber. Inasmuch as the wood is kiln dried or thoroughly seasoned before this bath, this means that there is not moisture disturbance factor for introducing warping or shrinking problems. Accordingly, as this immersion is effective to be the equivalent of penetration for heat, if not for the thin liquid at the 1 temperature of say 250 to 350 F., the reduced portion may be removed from the bath, and have the formed ferrule (Fig. 3) thrust thereon in the assembly of Fig. 5. 1

Such straight assembly may be distorted by placing such unit on a die member I8 to be opposed by a complementary die member I9 in a press. This placing is preferably with the weld II along the concave or non-stretch receiving Resultantly therefrom, a bend is imparted to the more reduced'portion in adapting the structure as a tool handle to receive a tang 2| from a tool 22 inserted to a shoulder 23 to close the small end I3 of this ferrule as in the bent handle. The tool may be a shovel, spade, fork, or other type of hand device. The distortion of the wood handle in conjunction with the non-heated ferrule as occurring at the taper with the heated wood or filler, is effected by first driving the snug fitting ferrule into position on the handle for the larger end of the ferrule to abut the shoulder 2. Notwithstanding the heating of the wood by immersion in a hot oil-bath, there is no resultant shrinkage. The oil is to an extent a lubricant to permit ready thrusting of the ferrule into position. I

The method of treatment, which includes immersing the wood in the hot oil, effects sufiicient I filling of the cells of the wood with the oil that 'the wood is strengthened toward retaining its original properties against collapse. In practice, 40

there is thus imparted a toughness against fracture, even to the extent that the wood may experience a change of form or give when subjected to excessive strain, and after such strain be removed, has resiliency to spring back therefrom to its prior form.

While the treatment hereinbefore considered has had to do with wood as air dried or kiln dried and the avoidance of tendency to fracture by maintaining the walls resilient due to the oil coating, experience herein goes further. In fact, unseasoned or green wood may be subjected to the bath herein with avoidance of shinkage Prob- .lems therefrom. This may mean that there is PA ENT OF ICE 10 ferrule covering portion at least should be immersed and for a slight distance therebeyond to avoid localization of fracture strain.

What is claimed and it is desired to secure by United States Letters Patent is:

The method of assembling a ferrule with a fibrous handle of the nature of wood, comprising heating a terminal portion of the handle in a 5 bath of hot oil, whereby the fibrous cells of the handle are sufiiciently filled to strengthen them toward retaining their original properties against collapse, inserting said terminal portion of the handle into a ferrule, then simultaneously bend- 10 ing said ferrule with the heated handle therein.

LAVON D. MILLER. 

